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| Company | Location | County | Certifications | License # |
|---|---|---|---|---|
| N. Douglas Schneider | — | — | Inspector | 619 |
| N. Douglas Schneider | Mattapoisett, MA | — | Designer | 2168 |
| Nathan Brintnall | — | — | Inspector | 13981 |
| Nathan Chin | Arlington, MA | — | Designer | 14603 |
| Nathan Clegg | Chelmsford, MA | — | Designer | 14884 |
| Nathan D. Torretti | — | — | Inspector | 4025 |
| Nathan D. Torretti | Ludlow, MA | — | Designer | 3052 |
| Nathan Poretta | Boston, MA | — | Designer | 14218 |
| Nathanael Nelko | Worcester, MA | — | Designer | 14817 |
| Nathanial Cataldo | Acton, MA | — | DesignerInspector | 14601 |
| Nathaniel Bautz | Brewster, MA | — | Designer | 15163 |
| Nathaniel Mahonen | Leominster, MA | — | Designer | 12753 |
| Nathaniel Parker | Portsmouth, NH | — | Designer | 14248 |
| Ned A. Saviski | Becket, MA | — | DesignerInspector | 14745 |
| Neil Fisher | — | — | Inspector | 15055 |
| Neil Gouveia | Bradford, MA | — | DesignerInspector | 14746 |
| Neil Jackson | — | — | Inspector | 3579 |
| Neil Jackson | Belchertown, MA | — | Designer | 1116 |
| Neil S. Keeney Ii | — | — | Inspector | 14735 |
| Nelson Burlingame | — | — | Inspector | 3065 |
| Niamh Tarrant | — | — | Inspector | 15140 |
| Nicholas Beausoleil | — | — | Inspector | 13982 |
| Nicholas Bellone | Charlestown, MA | — | Designer | 14607 |
| Nicholas Corcoran | Marshfield, MA | — | DesignerInspector | 14866 |
| Nicholas Courtney | Hanover, MA | — | DesignerInspector | 14892 |
| Nicholas Curtis | — | — | Inspector | 14583 |
| Nicholas Day | Florence, MA | — | Designer | 14758 |
| Nicholas Dufresne | Stoughton, MA | — | DesignerInspector | 15028 |
| Nicholas Geneseo | — | — | Inspector | 13988 |
| Nicholas Granata | Manchester, NH | — | Designer | 14907 |
| Nicholas Greenwood | — | — | Inspector | 15142 |
| Nicholas J. Bubier | — | — | Inspector | 14461 |
| Nicholas Kelling | Plainville, MA | — | Designer | 15016 |
| Nicholas Kondek | Dedham, MA | — | Designer | 15174 |
| Nicholas P. Santangelo | Marlborough, MA | — | Designer | 14410 |
| Nick A. Alecon | Worcester, MA | — | DesignerInspector | 14949 |
| Nick Torretti | — | — | Inspector | 4496 |
| Nicola Facendola | Plainville, MA | — | Designer | 2819 |
| Nicole I. Duquette | Hampstead, NH | — | Designer | 2682 |
| Nicole L. Letendre | Swansea, MA | — | Designer | 1367 |
| Nicole M. Gauthier | Palmer, MA | — | DesignerInspector | 14824 |
| Niki Jo Vaughan | Rutland, MA | — | DesignerInspector | 14706 |
| Nolan Bernier | Seekonk, MA | — | Designer | 14739 |
| Nolan Davis | Beach, MA | — | Inspector | 15120 |
| Norman Bartlett | — | — | Inspector | 3581 |
| Norman Hill | — | — | Inspector | 1842 |
| Norman Hill | Grafton, MA | — | Designer | 1065 |
| Nyles Zager | Lakeville, MA | — | Designer | 2781 |
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